JP3642533B2 - Program card and computer using the same - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a program card and a computer using the program card.
[0002]
[Prior art]
In recent years, the integration technology for integrated circuits (including LSI, VLSI, etc., hereinafter referred to as “ICs”) has been remarkably developed. Etc., and a program and calculation data (hereinafter referred to as “program information”) indicating a calculation procedure are stored therein, thereby easily detachable computer main storage device or auxiliary storage device (hereinafter referred to as “storage device”). It has become common to use as
[0003]
By the way, the program information and the like stored in the IC and the like are expressed in binary numbers, and the program information is collectively read into the main memory in the computer. Then, the central processing unit (hereinafter referred to as “CPU”) of the computer sequentially reads from the main memory, interprets the contents and executes the instructions. A computer that reads program information into a storage device of a computer and interprets it while sequentially reading it is called a Neumann computer.
[0004]
However, in the conventional removable storage device in the Neumann computer, it is necessary to communicate program information with a CPU of the computer main body via a predetermined signal line. Therefore, the user can read out the program information by the program decoding device and decode the program information as if the CPU read out the program information through the signal line. This means that program information can be decoded as long as the program information is communicated via a signal line even if it is integrated into an IC. It was difficult to protect against unauthorized duplication or modification by a third party.
[0005]
[Problems to be solved by the invention]
In the conventional removable storage device in the Neumann computer, it is necessary to communicate program information with a CPU of the computer main body via a predetermined signal line. Therefore, the user can read out the program information by the program decoding device and decode the program information as if the CPU read out the program information through the signal line. This means that program information can be decoded as long as the program information is communicated via a signal line even if it is integrated into an IC. It was difficult to protect against unauthorized duplication or modification by a third party.
Therefore, the present invention provides a storage device that makes it difficult to illegally copy or remodel program information, and a computer using the same.
[0006]
[Means for Solving the Problems]
The invention according to claim 1 of the first invention is a program card in which program information is stored in an addressed unit storage cell group, and the program information is read out via a predetermined interface in response to a command from the computer main body. A program information reading means for reading program information from the unit storage cell in accordance with an address value indicating the address sent from the computer main body, and means for sending the program information read by the means to the computer main body. It is a program card provided.
[0007]
Here, the unit storage cell group in the program card corresponds to a program storage device in the following embodiments. The program information can be read from the unit storage cell to which the address indicated by the address specification signal is assigned and written to the unit storage cell by an external address specification signal (address value) and a read / write signal. The invention according to claim 2 of the first invention is the program card storing the program information in the unit storage cell group to which the address is attached, and the program information stored in the program card is read out through a predetermined interface. A program card comprising a computer main body for interpreting and executing and a computer using the program card, wherein the program card reads program information from the unit memory cell in accordance with an address value indicating the address; , Program read by this means Means for sending information to the computer main body, the computer main body sending address value holding means for holding the address value, and sending the address value held in this means to the program information reading means of the program card. A program card comprising an address value sending means and an instruction control execution means for executing command control based on the program information sent from the program information sending means, and a computer using the program card.
[0008]
The invention according to claim 3 of the second invention is a program card in which program information is stored in an addressed unit storage cell group, and the program information is read out via a predetermined interface in response to a command from the computer main body. And decrypting the address value indicating the address sent from the computer main body based on a predetermined encryption key, and the program information from the unit memory cell according to the address value decrypted by the means Program information reading means for reading, means for identifying an instruction code portion and an address operand portion of the program information read by this means, and an address operand portion identified by this means based on a predetermined encryption key Encryption means for encrypting, and the instruction code part and the encryption means The Goka address operand portion is a program card with program information sending means for sending to said computer main body.
[0009]
According to a fourth aspect of the second invention, a program card storing program information in an addressed unit storage cell group and the program information stored in the program card via a predetermined interface are provided. A program card having a computer main body for reading, interpreting and executing, and a computer using the program card, wherein the program card decrypts an address value indicating the address based on a predetermined encryption key And program information reading means for reading program information from the unit memory cell according to the address value decoded by the means, and an instruction code portion and an address operand portion of the program information read by the means are identified. Means and an address operand part identified by the means are connected to a predetermined encryption key. Encryption means for encrypting based on the command code, and program information sending means for sending the instruction code part and the address operand part encrypted by the encryption means to the computer main body, the computer main body comprising the address An address value holding means for holding a value, an address value sending means for sending the address value held in this means to the program information reading means of the program card, and an instruction code part and a cipher sent by the program information sending means And a computer using the program card including instruction control execution means for executing instruction control based on the converted address operand part.
[0010]
The invention according to claim 5 of the third invention is a program card in which program information is stored in an addressed unit storage cell group, and the program information is read out via a predetermined interface in response to a command from the computer main body. The address value holding means for holding the address value indicating the address, the program information reading means for reading the program information from the unit memory cell according to the address value held in the means, and the program information read by the means , The address value changing means for changing the address value held in the address value holding means, and the program information for sending the program information read by the program information reading means to the computer main body A program card comprising sending means.
[0011]
The invention according to claim 6 of the third invention is a program card storing program information in a unit storage cell group to which an address is attached, and the program information stored in the program card via a predetermined interface. A program card having a computer main body for reading, interpreting and executing, and a computer using the program card, the program card being held in the address value holding means for holding an address value indicating the address, and the means Program information reading means for reading program information from the unit memory cell according to the address value, and when the program information read by the means satisfies a predetermined condition, the address value held in the address value holding means is Address value changing means to be changed and read by the program information reading means Program information sending means for sending the program information to the computer main body, and the computer main body comprises instruction control execution means for executing command control based on the program information sent by the program information sending means. A program card and a computer using the program card.
[0012]
[Action]
According to the first invention, the program storage device storing the program information and the machine language command reading device are provided in the program card, and the machine language command is sent to the computer main body step by step. This eliminates the need to load all program information into the main memory of the computer.
[0013]
According to the second invention, the encryption device, the encryption key generation device, and the decryption device are provided in the program card, and the contents of the program counter are encrypted by the encryption device. Here, since the generated encryption key changes every time, even if the original address value is the same, it becomes a different encrypted address value every time. Therefore, it is not possible to know where the program has returned from the outside, and the execution control of the program can be hidden from the outside.
[0014]
According to the third invention, since the program counter and the program counter calculation device for controlling the contents of the program counter are provided in the program card, the program execution control is completely separated from the computer main body. As a result, the normal program counter update and the update of the program counter based on the execution control instruction are performed in the program card, so that the execution control can be completely hidden even when the program is executed by the JUMP instruction or the like. Become.
[0015]
【Example】
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram showing an application target of a program card according to the present invention and a computer using the program card. As shown in the figure, the present invention relates to an apparatus for making a computer card 3 accessible by attaching a program card 1 storing program information to a program card reader 2 and executing a program according to the program information. is there.
[0016]
Here, the program card 1 is a so-called IC card capable of storing program information by an integrated circuit such as a ROM, RAM, or EEPROM provided therein, and includes not only a card type but also a cartridge type. Shall. The program card 1 has a structure in which the internal integrated circuit is protected by the outer case, but the structure of the IC card is lost when the outer case is opened.
[0017]
The program card reader 2 can be attached to and detached from the program card 1, reads program information stored in the installed program card 1, and inputs / outputs when writing program information from the computer main body 3. It plays the role of a device.
[0018]
The computer main body 3 is composed of a keyboard, a display, an auxiliary storage device, a main storage device, a central processing unit, and the like, and has a function of a normal computer. In the present invention, in addition to that, via the program card reader 2 A function for accessing a program card 1 to be described later is provided.
[First invention]
FIG. 2 is a conceptual diagram showing the configuration of the program card according to the first invention and a computer using the program card.
[0019]
The present invention stores program information in a program card, and sends the program information stored in the program card to the computer main body each time a read request is received from the computer main body. That is, in FIG. The contents (address value) of the program counter (PC) 202 are sent to the machine language instruction reading device 203 in the program card 1 via the program reader 2. The machine language instruction reading device 203 reads a machine language instruction from the program storage device 204 according to the address value, and sends it to the instruction interpretation execution device 205 of the computer main body 3 via the program reader 2. The instruction interpretation execution device interprets the machine language instruction, executes the instruction based on the result, and accesses the main storage device 206 if necessary.
[0020]
The configuration of the program card according to the present invention as described above and a computer using the program card will be further described in detail.
FIG. 3 is a detailed view showing the configuration of the program card according to the first invention and a computer using the program card.
[0021]
In the figure, an arithmetic unit (ALU) 301 provided in the computer main body performs an operation designated by the operation designation on the data given by the L bus and the R bus, and outputs the operation result to the O bus. .
[0022]
The condition code register (CCR) 302 can set the state (for example, N, Z, V, C) of the result of the operation performed by the operation device 301 by designation from the instruction control device 201 described later.
[0023]
The accumulator register (ACC) 303 is a so-called working register, and can output data fetched from the O bus to the L bus.
The program counter 202 described above can increase its address value by 1 in response to a command from the instruction control device 201. The contents of the program counter 202 can be output to the L bus and the A1 bus.
[0024]
A main storage address register (MAR) 304, a read data register (RDR) 305, and a write data register (WDR) 306 are used for reading and writing of the main storage device.
[0025]
The instruction register (IR) 307 can set a machine language instruction composed of an instruction code part and an operand part. The instruction code part is sent to the instruction control unit 201 and the operand part is sent to the L bus.
[0026]
The instruction control unit 201 performs output from each register to each bus, input from each bus to each register, designation of calculation, read / write control of the main storage device 206, etc. according to the contents of the instruction code part and the condition code register 302. It can be carried out. A control signal line for this purpose is wired from the instruction control device 201 to each register, but is omitted here.
[0027]
On the other hand, the machine language instruction reading device 203 provided in the program card takes in the address value from the program counter 202 provided in the computer main body and sends it to the program storage device 204. At the same time, by receiving the address value, the machine language instruction reading device 203 sets the read signal line 308a to the read state (for example, “H”) and the select signal line 309a to be active (for example, “L”). Data is read from the program storage device 204 and sent to the instruction register 307 of the computer main body.
[0028]
The program car according to the present invention configured as described above and the computer using the same operate as follows.
That is, the instruction control device 201 first outputs the contents of the program counter 202 to the A1 bus. The address value output to the A1 bus is sent to the instruction reading device 203 via a program card reader (not shown). The instruction reading device 203 sends the address value from the program counter 202 to the program storage device 204 and activates the read signal line 308a to “H” and the selection signal line 309b. Then, after waiting for the program storage device reading time, that is, after the time when the read data will be taken into the instruction reading device 203, it is taken in. Further, the instruction reading device 203 sends the read data to the instruction register 307 via the program card reader, and the instruction register 307 takes in the data. This operation corresponds to instruction fetching in a normal computer. After the instruction fetch, the contents of the program counter 202 are incremented by 1 in preparation for moving to the next instruction.
[0029]
The instruction register 307 transmits an instruction code portion of the fetched data to the instruction control device 201, so that the instruction control device 201 interprets the instruction code and performs an operation according to the result.
[0030]
For example, assume that the data fetched into the instruction register is a LOAD instruction. Then, the instruction control device 201 outputs the operand part of the instruction register 307 to the R bus, does not output anything to the L bus, and adds the operation designation. As a result, the data on the L bus is output to the O bus as it is, and this data is taken into the main memory address register 304.
[0031]
Next, the contents of the main memory address register 5 are output to the A 2 bus, the read signal line 308b is set to “H”, and the selection signal line 309b is activated to read the main memory device 206. As a result, the data is read from the main memory according to the contents of the main memory address register 304, that is, the value indicated by the operand part of the LOAD instruction. This operation corresponds to operand fetch in a normal computer. Then, after waiting for the read time of the storage device, the data read on the D bus is taken into the read data register 305.
[0032]
Next, the contents of the read data register 305 are output to the R bus, nothing is output to the L bus, and the operation designation is added. As a result, since the data on the R bus is output to the O bus as it is, the data on the O bus is taken into the accumulator register 303. Further, the portion corresponding to “N” and “Z” in the state of the operation result of the operation device is taken into the condition code register 302. This operation corresponds to instruction execution.
[0033]
Since the execution of the LOAD instruction is completed in this way, the instruction control device 201 repeats instruction fetch, operand fetch, and instruction execution.
In this embodiment, only the LOAD instruction is shown, but a STORE instruction that is an instruction to be written in the main storage device 206 and a JUMP instruction that controls the execution order also operate in the same manner.
[0034]
As described above, according to the first invention, the program storage device 311 storing the program information and the machine language instruction reading device are provided in the program card, and the machine language instructions are sent to the computer main body step by step. This eliminates the need to load all program information into the main memory of the computer. Therefore, the user can grasp the specific execution sequence of the program information, but it is easy to decipher what the entire program looks like, as not all instructions are executed at most once. I can't.
[Second invention]
FIG. 4 is a conceptual diagram showing the configuration of a program card according to the second invention and a computer using the program card.
[0035]
The present invention further adds a configuration related to encryption / decryption to the first invention in order to make it difficult to decrypt the program information stored in the program card even for a specific execution sequence. In addition, the same code | symbol is attached | subjected about the same thing as 1st invention.
[0036]
That is, in the figure, the content from the program counter 202 is sent to the decryption device 401 in the program card 1 via the program reader 2. Here, the contents of the program counter 202 are composed of an address value X (X is an arbitrary number of bits) and an index value C (C is an arbitrary number of bits) encrypted by an encryption device 402 described later. This is expressed as “(X, C)”.
[0037]
The decryption device 401 decrypts the encrypted address value X, and sends a value obtained by adding the index value C to the decrypted value x to the machine language instruction reading device 203 as an original address value. The machine language instruction reading device 203 reads a machine language instruction from the program storage device 204 according to the address value, and sends it to the encryption device 402.
[0038]
The encryption device 402 encrypts the value of the operand part of the machine language instruction in accordance with the encryption key generated by the encryption key generation device 403, and then uses the program reader 2 to calculate the encrypted address value X ′. It is sent to the instruction interpretation execution device 205 of the main body 3.
[0039]
The instruction interpretation execution device 205 interprets the machine language instruction, executes the instruction based on the result, and accesses the main storage device 206 if necessary. Also, in the present invention, when the instruction interpretation execution unit 205 interprets an execution control instruction (for example, a JUMP instruction), the encrypted address value X ′ described in the operand part is used as the program counter. 202 is set anew. On the other hand, in the case of an instruction other than the execution control instruction (for example, a LOAD instruction), the index value of the contents of the program counter 202 is increased by one.
[0040]
For example, the execution address of the program will be described according to the program shown in FIG. That is, the program shown in FIG. 5A is a program in which the content of the memory M1 is obtained by multiplying the content of the memory M2 by the content of the memory M3. If the contents of the memory M3 are “2”, the contents of the program counter 202 are as shown in FIG. That is, when interpreting and executing the JUMP instruction (BLE, JMP) of S5 or S9, the address value “S10” or “S2” described in the operand part is encrypted, so that any location on the program from the outside I don't know how I returned to As a result, the loop structure of S2 to S9 can be concealed, which is more difficult than the decoded image of the program.
[0051]
【The invention's effect】
As described above, according to the first invention, the program storage device storing the program information and the machine language instruction reading device are provided in the program card, and the machine language instructions are sent to the computer main body step by step. This eliminates the need to load all program information into the main memory of the computer. Therefore, the user can grasp the specific execution sequence of the program information, but it is easy to decipher how the entire program is, because not all instructions are executed in one execution at most. Can not be.
[0052]
According to the second invention, when interpreting and executing a JUMP instruction or the like which is an execution control instruction, the address value described in the operand part is encrypted. become unable to know. As a result, the loop structure of the program can be concealed, which is more difficult than the decoded picture of the program.
[0053]
According to the third invention, normal program counter updating and program counter updating based on execution control instructions are performed in the program card. Therefore, even when a program is executed by a JUMP instruction or the like as an execution control instruction, execution control is performed. Can be completely hidden.
[Brief description of the drawings]
FIG. 1 is a diagram showing an application target of a program card according to the present invention and a computer using the program card.
FIG. 2 is a conceptual diagram showing the configuration of a program card according to the first invention and a computer using the program card.
FIG. 3 is a detailed view showing the configuration of a program card according to the first invention and a computer using the program card.
FIG. 4 is a conceptual diagram showing the configuration of a program card according to a second invention and a computer using the program card.
FIG. 5 is a diagram showing a program for explaining execution control.
FIG. 6 is a conceptual diagram showing the configuration of a program card according to a third invention and a computer using the program card.
FIG. 7 is a detailed view showing the configuration of a program card according to a third invention and a computer using the program card.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Program card 2 ... Program card reader 3 ... Computer main body 201 ... Command control apparatus 202 ... Program counter 203 ... Machine language command reading device 204 ... Program storage device 205 ... Command interpretation execution device 206 ... Main memory device

Claims (4)

Program information consisting of machine language instructions constituting a program is stored in a unit memory cell group consisting of unit memory cells in which one-step program information is stored and addressed, and through a predetermined interface in response to a command from the computer main body. In the program card from which the program information is read,
Decryption means for decrypting an address value indicating the address sent from the computer main body based on a predetermined encryption key;
Program information reading means for reading program information step by step from the unit storage cell corresponding to the address value decoded by the means;
Of the program information read by the means, means for identifying the instruction code portion and the address value;
Encryption means for encrypting an address value based on a predetermined encryption key when the instruction code identified by the means is an execution control instruction ;
A program card comprising: a program information sending means for sending an address value encrypted by the instruction code part and the encryption means to the computer main body. A program card storing program information in a unit memory cell group comprising machine language instruction sequences constituting an addressed program comprising unit memory cells to which program information of one step is stored and addressed, and the program card A program card including a computer main body for reading, interpreting and executing the program information stored in the computer via a predetermined interface, and a computer using the program card,
The program card is
Decryption means for decrypting an address value indicating the address based on a predetermined encryption key;
Program information reading means for reading program information step by step from the unit storage cell corresponding to the address value decoded by the means;
Of the program information read by the means, means for identifying the instruction code portion and the address value;
Encryption means for encrypting an address value based on a predetermined encryption key when the instruction code identified by the means is an execution control instruction ;
Program information sending means for sending the instruction code part and the address value encrypted by the encryption means to the computer main body,
The computer body is
Address value holding means for holding the address value;
Address value sending means for sending the address value held in this means to the program information reading means of the program card;
A computer using a program card, comprising: an instruction code portion sent by the program information sending means; and an instruction control execution means for executing instruction control based on an encrypted address value. Program information consisting of machine language instructions constituting a program is stored in a unit memory cell group consisting of unit memory cells in which one-step program information is stored and addressed. In the program card from which the program information is read:
Decryption means for receiving an address value indicating the address sent from the computer main body and an index value indicating a relative position of the address value, and decrypting the address value based on a predetermined encryption key;
Program information reading means for reading program information from the unit memory cell corresponding to an address calculated from the address value decoded by the decoding means and the index value;
Means for identifying an instruction code portion and an address value in the program information read by the means;
Encryption means for encrypting an address value based on a predetermined encryption key when the instruction code identified by the means is an execution control instruction;
A program card comprising: a program information sending means for sending an address value encrypted by the instruction code part and the encryption means to the computer main body. A program card storing program information in a unit memory cell group comprising machine language instruction sequences constituting an addressed program comprising unit memory cells to which program information of one step is stored and addressed, and the program card A program card including a computer main body that reads, interprets, and executes program information stored in the computer via a predetermined interface and a computer using the program card
The program card is
Decryption means for receiving an address value indicating the address sent from the computer main body and an index value indicating a relative position of the address value, and decrypting the address value based on a predetermined encryption key;
Program information reading means for reading program information from the unit memory cell corresponding to an address calculated from the address value decoded by the decoding means and the index value;
Means for identifying an instruction code portion and an address value in the program information read by the means;
Encryption means for encrypting an address value based on a predetermined encryption key when the instruction code identified by the means is an execution control instruction;
Program information sending means for sending the instruction code part and the address value encrypted by the encryption means to the computer main body,
The computer body is
Address value holding means for holding the address value;
Address value sending means for sending the address value and an index value indicating a relative position of the address value to the program information reading means of the program card;
A computer using a program card, comprising: an instruction code portion sent by the program information sending means; and an instruction control execution means for executing instruction control based on an encrypted address value.

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